Improvement in boring-tool



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N. PETERS, F

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` this specification.` n

EDWIN E. WHITNEY AND EEUBEN' JoNEs, OE UNION MILLS, PENNSYL- VANIA.

amers Patent No. 103,265, daad May 17, 1ero.

-vow- IMPRovEMn-NT ,IN BORING-Toor..

l"The `Schedule referred to in these Letters Patent and `making part of th'e same.

To all whom it ,may concern:

new and improyed `Boring-lool; 'and we? do hereby declare that the following is a`full,c1ear, and exact @description thereof; `whiehwill enable others skilled -in` the art to make-and use the same, reference being hadto 4the accompanyingr 'drawing forming part of lhis invention relateslto a new and useful improvemeut in a `tool or bitfor boring wooden pipes for pumps .or wooden,tubing,lfor conveying water, steam',

gas, or other liquid or fluid; and i f ,-.It consistsin a bit or boring-tool', formed from a4 `solid vpiece of steel or other suitable metal, with two j l cutting-lips, formed ashereinafter more fully described,

d vIn the accompanying drawing- Figure 1 represents a longitudinal side view of the aiticle, showing the form or curve of the cutting-lips. Figure`2 is a view `of ,the end or face of the bit.'

i Similar letters ofVreferenee lindicate corresponding i parts. 1,

f A is the bitor boring-tool. Y i B represents theshank, which may be attached to -any suitable boring'g-head,by` means of the simple square shank C, or by means of the screw-shank D,

as may be found `rnosteonvenient.

E and F represent the cutting-lips. These lips are l formed by drawing down the metal from the shank to a fthin plate, then splitting the plate centrally parallel with the shank or line of rotation, and then turning the two parts thus made in opposite direc.

tions, and curving them as seen in iig. 1.

rG G are the cutting-edges.` The back edges of' these lips are' slightlyturued toward the shank, so that the cutting-edges G G readily engage with the wood.

The points of' the lips H H are curved round' to-` Patent p y 1 The bit or boring-'tool herein desocribed, consisting of the cutting-lips E and F, bent outward in opposite directions, and curved upward and inward at their ends, as shown, said lips being formed ou a shank l which is either square or screw-threaded, as and for EDWIN E. WHITNEY. EEUBEN JONES.

the purpose speoited.

Witnesses:`

M. B. GHAMBERLIN, E; I. MILLER. 

